Like WriteContextDiff but returns the diff a []byte.

Like WriteUnifiedDiff but returns the diff a []byte.

Split a []byte on "\n" while preserving them.

Compare two sequences of lines; generate the delta as a context diff.

Compare two sequences of lines; generate the delta as a unified diff.

This is essentially a map from lines to line numbers, so that later it can be made a bit cleverer than the standard map in that it will not need to store copies of the lines.

SequenceMatcher compares sequence of strings.

Unified diff parameters.